Fusion AWD V6-3.5L (2010)
The system is operating correctly at this time. The concern may have been caused by a discharged battery. REPEAT the self-test. TEST the system for
normal operation.
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Pinpoint Test I: DTC U3003:17
High-Voltage Converter/Inverter
Pinpoint Tests
Pinpoint Test I: DTC U3003:17
Refer to Wiring Diagram Set 12 (Fusion/Milan/MKZ, Fusion Hybrid/Milan Hybrid), Charging System for schematic and connector information. See:
Diagrams/Electrical Diagrams/Diagrams By Number
Normal Operation
The DC to DC Converter Control Module (DC/DC) monitors the 12-volt battery system voltage internally at the B+ terminal of the DC/DC. If the
voltage is greater than 16 volts, the DC/DC sets DTC U3003:17 and requests CHECK CHARGING SYSTEM be displayed in the message center. The
DC/DC will be in standby mode (DC/DC disabled) and the 12-volt battery will eventually be drained. Reduced or no functionality of 12-volt systems
(headlamps, HVAC blower motor, etc.) may also be noticed.
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DTC U3003:17 (Battery Voltage: Circuit Voltage Above Threshold) - Sets if the 12-volt battery system voltage is greater than 16 volts.
This pinpoint test is intended to diagnose the following:
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12-volt battery jump started or incorrectly charged
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Customer-installed accessory
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DC/DC
PINPOINT TEST I: DTC U3003:17
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I1 CHECK VOLTAGE AT THE DC/DC
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Start the engine.
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Turn off the headlamps, blower and any other accessories.
